Send Openmediavault notifications to your preferred notification service instead of using mail

I already posted this as an answer on another thread and since I searched for a solution to get notifications to my gotify instance for a while now. I did not find a well documented solution. Here is my way of getting notified via gotify (but any other notification service is possible. Apprise supports multiple notification services.

1) Create a mailrise docker container on the OMV server with docker compose:

services:  
    mailrise:    
        image: yoryan/mailrise    
        container_name: mailrise    
        restart: unless-stopped    
        ports:      
            - 8025:8025    
        volumes:      
            - ./mailrise.conf:/etc/mailrise.conf:ro

the mailrise.conf has to be set. I am using a config for receiving notifications via gotify which is shown below, but this can be configured using any apprise url structure.

The URL is from apprise and can be seen in the apprise gotify notify docs :

configs:
# You can send to this config with "gotify@mailrise.xyz".
#
gotify:  urls:    - gotifys://URL/API

Then set the OMV notification settings accordingly:

SMTP-server: 192.168.1.2 (change this to your OMV instance local IP-adress.)

SMTP-port: 8025

Encryption: None

Sender email: any@any.com

recipient email gotify@mailrise.xyz (change according to the mailrise.conf)

This forwards mail received to my gotify instance and notifies me.